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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        function Person(name, age) {
            this.name = name;
            this.age = age;
        }
        Person.prototype.sayName = function () {
            console.log('大家好，我的名字是' + this.name + '，今年' + this.age + '岁了');
        }
        const person1 = new Person('张三', 18);
        console.log(person1);
        console.log(person1.__proto__);
        console.log(Person.prototype);
        console.log(person1.__proto__ === Person.prototype);
        console.log(person1.constructor);
        console.log(Person.prototype.constructor);
        console.log(person1.constructor === Person.prototype.constructor);
    </script>
</body>

</html>